By late 2011 there will be more than 7 billion people in the world, with 8 billion in 2025 and 9 billion before 2050. New technologies and institutions, and a lot of hard work have enabled us to avoid widespread Malthusian misery. Global income per capita has increased 150 percent since 1960,...

Between 2000 and 2050, the share of the population aged 60 and over is projected to increase in every country in the world. Although labor force participation rates are projected to decline from 2000 to 2040 in most countries, due mainly to changes in their age distributions, labor force-...

Health is a direct source of human welfare and also an instrument for raising income levels. The authors discuss a number of mechanisms through which health can affect income, focusing on worker productivity, children's education, savings and investment, and demographic structure. As well as the...